Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
scsi: arcmsr: Fix doorbell status being updated late on ARC-1886
It is possible for the IOP to be delayed in updating the doorbell
status. The doorbell status should not be 0 so loop until the value
changes.
Link: https://lore.kernel.org/r/afdfdf7eabecf14632492c4987a6b9ac6312a7ad.camel@areca.com.tw
Signed-off-by: ching Huang <ching2048@areca.com.tw>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
authored by
ching Huang
and committed by
Martin K. Petersen
d9a23122
2a38d2a8
+9
-2
+9
-2
drivers/scsi/arcmsr/arcmsr_hba.c
+9
-2
drivers/scsi/arcmsr/arcmsr_hba.c
···
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static void arcmsr_hbaE_doorbell_isr(struct AdapterControlBlock *pACB)
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{
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-
uint32_t outbound_doorbell, in_doorbell, tmp;
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+
uint32_t outbound_doorbell, in_doorbell, tmp, i;
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struct MessageUnit_E __iomem *reg = pACB->pmuE;
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-
in_doorbell = readl(®->iobound_doorbell);
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if (pACB->adapter_type == ACB_ADAPTER_TYPE_F) {
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for (i = 0; i < 5; i++) {
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in_doorbell = readl(®->iobound_doorbell);
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if (in_doorbell != 0)
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break;
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}
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} else
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in_doorbell = readl(®->iobound_doorbell);
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outbound_doorbell = in_doorbell ^ pACB->in_doorbell;
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do {
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writel(0, ®->host_int_status); /* clear interrupt */